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Drivetrain› Belt and Chain Drive

RK Racing

RK Chain 520SO-100FT O-Ring - Natural

$1,561.30 $1,405.17 Save $156.13

SKU: R05K 520SO-100FT

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

RK's traditional round O-ring chain offers a blend of performance and affordability. The SO's O-ring is made from Nitrite Butadiene to seal in lubrication, ensuring smooth power delivery with minimal drag. These chains are suitable for low to mid-range CC motorcycles that originally came with sealed chains. The 520SO can be used for both street and off-road applications up to 400cc and is available only in a natural finish.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandRK Racing
Part NumberR05K 520SO-100FT

Videos

RK Chain Tool UCT2100(50) Instructions with Team Rockstar Energy Husqvarna Factory Racing.

RK Chain Tool UCT2100(50) Instructions with Team Rockstar Energy Husqvarna Factory Racing.
RK Chain Clip vs Rivet Connecting Link

RK Chain Clip vs Rivet Connecting Link
RK/Driven Racing Chain and Sprocket Kit Install from Sportbiketrackgear.com

RK/Driven Racing Chain and Sprocket Kit Install from Sportbiketrackgear.com

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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